Occurrence and feeding habit of the settled larval and juvenile spotted halibut Verasper variegatus at sandy beaches on the western coast of Kyushu, Japan

Noichi, Tetsuhisa; Hirata, Ikuo

doi:10.2331/suisan.72.366

Cited by 7 publications

(6 citation statements)

References 15 publications

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“…Then, metamorphic larvae actively use selective tidal stream transport to reach the preferred settlement areas [27,28]. The fact that wild spotted halibut juveniles have never been collected from exposed sandy shores, which stone flounder and marbled flounder juveniles inhabit [17,29,30], supports the existence of an active habitat selection process of spotted halibut larvae, which reportedly settle into shallower nurseries [6,7]. Collection data from the beam-trawl surveys and gill-net fishery at the eastern waterway revealed that spotted halibut were able to inhabit almost the entire northern part of the lagoon.…”

Section: Occurrence and Distributionmentioning

confidence: 91%

“…Recently, ecological information of wild juveniles in western Japan (Nagasaki Prefecture) has been reported [6][7][8]; metamorphic larvae (C15.2 mm TL) settle into shallower nurseries (\1 m depth at low water spring tide) mainly in March, juveniles inhabit nearshore areas, and achieve high growth by feeding exclusively on crustaceans. Most age-1 juveniles migrate to deeper waters during the subsequent May-June.…”

Section: Introductionmentioning

confidence: 99%

“…This flatfish, growing to over 65 cm total length (TL) [1], has been nominated as a promising candidate for stock enhancement following the Japanese flounder Paralichthys olivaceus because of its high market price, high growth performance, and severely depleted stock condition in Japan [3][4][5] (total catch: around 10 metric tons/year). Specific habitat requirements during settlement include shallow tidal flats [6] and protected sandy shores [7]. Recent degradation and/or loss of these key habitats have been presumed to contribute to reduced recruitment of wild fish and isolation of small local populations [8].…”

Section: Introductionmentioning

confidence: 99%

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Habitat utilization, feeding, and growth of wild spotted halibut Verasper variegatus in a shallow brackish lagoon: Matsukawa-ura, northeastern Japan

Wada¹,

Kamiyama²,

Shimamura³

et al. 2011

Fish Sci

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Habitat utilization, feeding, and growth of a rare pleuronectid flatfish, spotted halibut Verasper variegatus, were examined in a brackish lagoon in northeastern Japan: Matsukawa-ura. The distribution and date-length data of spotted halibut collected mainly from beam-trawl samplings during 1983-2008 indicated that age-0 juveniles [n = 25, 6.0-18.0 cm total length (TL)] and older spotted halibut (n = 71, 13.8-43.0 cm TL) inhabited almost the entire northern part of Matsukawa-ura. Comparative distribution surveys of spotted halibut, stone flounder, and marbled flounder during 1985-1989 revealed similar distribution patterns of these flatfishes; the highest densities were found around the central part of Matsukawa-ura, although significantly lower abundance was detected for spotted halibut. Linear growth equations of age-0 juveniles demonstrated that spotted halibut were able to achieve high growth after June, probably because abundant prey (e.g., mysids and gammarids) and suitable physical conditions (warmer water temperature and lower salinity) were present. The main prey items shifted from various crustaceans including mysids, caridean shrimps, and anomurans to brachyura Hemigrapsus spp. (C20 cm TL). Our study shows that spotted halibut use the shallow brackish lagoon as an important nursery for juveniles, and also as a feeding ground for young and adults.

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Section: Occurrence and Distributionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Habitat utilization, feeding, and growth of wild spotted halibut Verasper variegatus in a shallow brackish lagoon: Matsukawa-ura, northeastern Japan

Wada¹,

Kamiyama²,

Shimamura³

et al. 2011

Fish Sci

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“…1) showed evidence of a strong habitat preference of juveniles for estuarine muddy tidal flats well protected from wave action (Wada et al 2006) and low salinity (Wada et al 2004). Habitat preferences are yet to be fully ascertained though estuaries with tidal flats are thought to be critical for survival of juveniles (Noichi et al 2006;Shimamura et al 2007). This insight provides a potential cue for the distribution pattern: passive planktonic drift would end up as an abortive dispersal unless such larval 'vagrants' happen to settle in places serving as suitable nursery areas, and thus potentially drive a localized recruitment leading to a discontinuous distribution (cf.…”

Section: Introductionmentioning

confidence: 96%

Genetic structure in species with shallow evolutionary lineages: a case study of the rare flatfish Verasper variegatus

et al. 2010

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We examined the genetic population divergence of the spotted halibut Verasper variegatus. A previous report suggested two conservation units for this species along the Japanese Pacific coast. Extending the coverage of the genomes (29 microsatellites and three mitochondrial DNA segments) revealed hitherto-undetected genetic population boundaries. We screened population samples from the major habitats along the Japanese coast and the Yellow Sea coast (East Asian Continent). Significant genetic differentiation was found in every comparison between the habitats. In most cases, the nuclear and mitochondrial population divergences were incongruent, most likely caused by differences between the two genomes in the effects of genetic drift after recent population isolation and bottleneck events. We discuss the ecological and evolutionary mechanisms of the genetic structure as well as the units of conservation. The present study illustrates the merits of wider coverage of genomes in genetic population analysis especially for species with a shallow population history.

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“…1a). Specific habitat requirements during settlement include shallow tidal flats (Wada et al 2006) or protected sandy shores (Noichi et al 2006); recent degradation and/or loss of these key habitats is considered to have contributed to reductions in recruitment of wild fish (Wada 2007). Numbers of spotted halibut juveniles released have increased from 1000 in 1993 to > 300 000 in 2006, with increased landings in some prefectures.…”

Section: Introductionmentioning

confidence: 99%

Successful stocking of a depleted species, spotted halibut Verasper variegatus, in Miyako Bay, Japan: evaluation from post-release surveys and landings

Wada¹,

Yamada²,

Shimizu³

et al. 2010

Mar. Ecol. Prog. Ser.

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Post-release adaptation and stocking effectiveness of a highly depleted pleuronectid flatfish, spotted halibut Verasper variegatus, were assessed in Miyako Bay, Japan. In early July 2004 and 2005, 22 000 and 5000 hatchery-reared juveniles (mean 81.2 and 89.8 mm total length, respectively) were released in shallow waters in the inner bay area. Results from surveys with a 2 m beamtrawl conducted over a 2 mo post-release period, laboratory predation experiments using potential predators (age-1 Japanese flounder), and a market census continued until December 2008, suggested that released juveniles, which had a size refuge from predators, could quickly adapt to brackish water habitats where there were suitable physical conditions (temperature, salinity and sediments) and abundant prey organisms. Juveniles selectively preyed on epibenthic gammarids and cumaceans, and had full stomachs 1 wk after release. Some released fish grew to > 40 cm by age-1+, feeding exclusively on larger crustaceans (e.g. isopods, carideans and brachyurans). Market census revealed that released fish showed > 99% contribution to catches, and recapture rates for fish released in 2004 (7.6%) and 2005 (15.7%) were higher than for releases in 2000 to 2003 (0.7 to 5.0%), possibly due to the development and application of improved release strategies (i.e. release habitat, size and season was appropriate in 2004 and 2005). Our study demonstrates that (1) local depleted stocks can be effectively restored by hatchery releases and that (2) development of release strategies based on the analysis of ecological interactions between released juveniles and the target ecosystem can largely contribute to the successful restocking of depleted species.

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Occurrence and feeding habit of the settled larval and juvenile spotted halibut Verasper variegatus at sandy beaches on the western coast of Kyushu, Japan

Cited by 7 publications

References 15 publications

Habitat utilization, feeding, and growth of wild spotted halibut Verasper variegatus in a shallow brackish lagoon: Matsukawa-ura, northeastern Japan

Habitat utilization, feeding, and growth of wild spotted halibut Verasper variegatus in a shallow brackish lagoon: Matsukawa-ura, northeastern Japan

Genetic structure in species with shallow evolutionary lineages: a case study of the rare flatfish Verasper variegatus

Successful stocking of a depleted species, spotted halibut Verasper variegatus, in Miyako Bay, Japan: evaluation from post-release surveys and landings

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